Relay



c. o. H'ARRIN-GTGN.

RELAY.

APPLICATION FILED APR. 17, 1918.

Patented June 15, 1920.

INVENTOR 2Q fm H. ATTORNEY.

||I||I,IIIIII 1 I IIJIIIIL UNrrED STATES PATENT orifice.,

CLINTON 0. HARRINGTON, OF SWISSVALE, PENNSYLVANIA, ASSIGNOR T0 THE UNIONSWITCH & SIGNAL COMPANY, 0F SWIS-SVALE, PENNSYLVANIA, A CORPORATION 0FPENNSYLVANIA.

Specification of Letters Patent.

RELAY.

Patented June 15, 1920.

To all whom t may concern.'

Be it known that I, CLINTON O. EARRING- '.roN, a citizen of the UnitedStates, residing at Swissvale, in the county of Allegheny and State ofPennsylvania, have invented certain new and useful Improvements inRelays, of which the following is a specification.

My invention relates to electromagnetic relays, and has for anobject theprovision of a relay of this type wherein the windings are placed asclose as possible to thepolepieces of the electromagnet, while the usualfeatures of insulation are maintained in so far as concerns the terminalposts of the relay.

I will describe one form of relay embodying my invention and will thenpoint out the novel features thereof in claims.

In the accompanying drawings, Figure l is a view showing in sideelevation one form of relay. embodying my invention. Fig. 2 is a topplan view of the relay, partly sectioned on the line II-II of Fig. l.Fig. 3 is a fragmental sectional view taken on the line III- III in Fig.2.

Similar reference characters refer tosimilar parts in each of the views.

Referring now to the drawings, the relay, in the form here shown,comprises a cylindrical box-like structure made up of a bottom plate l,a glass ring 2 forming the sides of the box, and a top plate 3. Theoperating parts of the relay are inclosed within this box-likestructure, and are supported by the top plate 3, which plate I willtherefore term the supporting member of the relay. This member is ofinsulating materiah'such as porcelain, hence it must be relatively thickto provide the necessary strength. 'T he terminal posts 4, connectedwith the relay contacts, are mounted in this supporting member 3 in theusual manner.

The supporting member 3 is provided with an elongated aperture 5, shapedsomewhat as shown in Fig. 2, which aperture is large enough toaccommodate both coils of the relay with ample clearance. The aperture 5is covered by a relatively thin non-magnetic metal plate 6 which restsagainst the under surface of member 3 and is fastened to this member byscrews 7. The plate 6 carries the electromagnet which comprises, asusual, a pair of soft iron cores 8, a polepiece 9 at one end of eachcore, a back strap l0 uniting the cores at the other end, and a thepole-pieces rest against the under`surface of this plate while the coilsrest against the upper surface thereof. It will be seen,

therefore, that the coils are brought very close to the pole-pieces,being separated therefrom only by the thickness of the plate 6.

The cores of the electromagnet may be attached to plate 6 in any desiredmanner. As here shown, each core 1s threaded for a short distance nearthe pole-piece and is screwed yinto the hole in plate 6 through whichthe core passes, this hole being threaded for the purpose. The threadson the core, which are designated 13, are of greater-diameter than theremainder of the core, so that the core slides freely through the holeup to the threaded portion. The core may be prevented from turning, ifdesired, by passing a dowel pin through the pole-piece and into t-heplate 6 after the core has been screwed into place in the plate.

In order to simplify the drawing, I have omitted the armature which iscontrolled by the electromagnet, and the contacts which in turn arecontrolled by the armature, these parts being of usual construction andforming no part of my invention.

By virtue of the construction thus described, I am enabled to retain theusual top plate 8 of insulating material, in which the terminal posts 4:may be mounted without concealed insulation, and yet I am enabled tobring the magnet coils much closer to the pole-pieces than is the casewhen the magnet is mounted directly on the plate or supporting member 3.This close relation of the coils and pole-pieces, of course, improvesthe efficiency of the relay.

Although I have herein shown and described only one form of relayembodying my invention, it is understood that various changes andmodifications may be made therein within the scope ofthe appended claimswithout departing from the spirit and scope of my invention.

I-Iaving thus described my invention, what I claim is:

l. A relay comprising a relatively thick supporting member of insulatingmaterial in which the terminal posts are mounted, said member having anaperture therethrough of suflicient size to accommodate erng theapeiture in the latter, and an electromagnet mounted in said metal plateWith its Cores passing therethrough, the pole-pieces abutting againstone surface ot said plate and the windings abuttingI against the otherSurface.

In testimony whereof I ailix my signature in presence of two Witnesses.

CLINTON O. HARRINGTON. Witnesses:

A. HERMAN VEGNER, FAY GLASGOW.

